[FFmpeg-devel] [PATCH 4/4] avformat/mxfenc: add some missing content package rates

[Carl Eugen Hoyos]

Am Mi., 4. März 2020 um 17:29 Uhr schrieb Tomas Härdin <tjoppen at acc.umu.se>:
>
> ons 2020-03-04 klockan 11:31 +0100 skrev Carl Eugen Hoyos:
> > Am Di., 3. März 2020 um 02:18 Uhr schrieb Marton Balint <cus at passwd.hu>:
> >
> > > 2) support all frame rates and write 0 (undefined) as the package rate
> > > for frame rates which cannot be exactly represented
> >
> > Why not?
> >
> > Allow me to repeat: Professional archivists recommend using mxf. How
> > do they store digitized content from (old) low-fps film?
>
> We can worry about that when archivists open tickets on trac.

A ticket was actually opened asking for more frame rates (just as
a ticket was opened earlier because of a limitation in aspect ratios),
I wonder why mxf is the only (?) libavformat muxer that tells the
user which frame rates (in the past: which aspect ratios) to use.
It is very hard to believe that the reason is that mxf does not allow
other frame rates (I have to listen once a year to a presentation
explaining how versatile mxf is compared to all other multimedia
containers).

Just print a warning when you feel that the chosen framerate will
not ensure maximum compatibility.

Carl Eugen